flow.c (calculate_global_regs_live): Clear aux fields of ENTRY and EXIT.

* flow.c (calculate_global_regs_live): Clear aux fields of
ENTRY and EXIT.

From-SVN: r51183

1 files changed, 5 insertions, 0 deletions

diff --git a/gcc/flow.c b/gcc/flow.c
index 71ed939..61008e6 100644
--- a/gcc/flow.c
+++ b/gcc/flow.c
@@ -1113,6 +1113,11 @@ calculate_global_regs_live (blocks_in, blocks_out, flags)
 	}
     }
 
+  /* We clean aux when we remove the initially-enqueued bbs, but we
+     don't enqueue ENTRY and EXIT initially, so clean them upfront and
+     unconditionally.  */
+  ENTRY_BLOCK_PTR->aux = EXIT_BLOCK_PTR->aux = NULL;
+
   if (blocks_out)
     sbitmap_zero (blocks_out);